Keyboard problems need help?

DOG SPILLED WATER ON MY LAPTOP AND EVENTUALLY THE KEYS STOPPED WORKING. SO I BOUGHT A KEYBOARD. IT WORKS BUT THERE IS PROBLEMS. SOME BUTTONS WHEN I HIT THEM BRING UP RANDOM THINGS. EXCEPT WHEN I USE THE SHIfT KEY. EVEN WITH THE SHIfT KEY THE "M" AND "f" BUTTONS DON"T WORK. THE ONES THAT WORK WITHOUT THE SHIfT KEY ARE qwtyiopkjhgsazxcvn. EACH THING DOES SOMETHING DIffERENT fROM TAKING YOU TO THE LOGIN SCREEN AND MINIMIZING THE OPENED SCREEN. NOW HERE'S THE RUB... NO MATTER WHAT KEYBOARD I USE IT DOES THE SAME THING! EVEN THE ON SCREEN KEYBOARD! HOW DOES THAT MAKE ANY SENSE?? SOMEONE PLEASE HELP THIS IS HORRIBLE!!! ALSO SOME LETTERS DO WORK BETTER ON EXTRA KEYBOARD RATHER THAN THE LAPTOP ONE... PLEASE HELP. MY WARRANTY DOESN"T COVER THIS AND COMPUTER ISN"T EVER A YEAR OLD

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